Classifying Matter The final Stage.

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Matter is classified into Pure substances- a type of matter that has fixed composition. Further classified into Elements and compounds Mixtures- a material.

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Presentation transcript:

Classifying Matter The final Stage

Matter Pure Substances Mixtures Homogeneous Solutions Heterogeneous Colloid Emulsion Suspension Mechanical Mixture Pure Substances Compounds Elements

At a glance…

Pure Substance or Mixture? Pure Substance: a substance that contains only one kind of matter; and has a fixed composition Mixture: substance consisting of two or more substances mixed together

Pure substances: Element or Compound Element: From the Periodic table, substances that are made of 1 type of atom and cannot be separated into simpler substances. Includes diatomic elements. Diatomic means two exact elements together like O2 Compound: more than one non diatomic element chemically combined in a fixed composition

Atoms to element… Atom Element

Element Carbon Sulphur

Atom to compound…

Compound: fixed composition

A fixed composition? Law of definite proportions: Elements and compounds are made up of 2 or more elements combined together in definite ratios(proportions) Table salt will always contain 1 sodium atom to 1 chlorine atom NaCl has 1Na : 1Cl H2O2 has 2H : 2 O

Mixture….

Mixture: Heterogeneous or Homogeneous “Heterogeneous mixture” means seeing different kinds “Homogeneous mixture”: seeing one kind (solution)

Homogeneous Mixture Mix of two or more pure substances that mix together so well it looks like only one substance 1 Phase Example: kool-aid or the alloy steel

Heterogeneous Mixture A mixture containing two or more substances that are visible/separate Examples: Density column, soil, pile of dice

Types: Ordinary mechanical mixture Examples: pizza, salad, soil. Can identify various visible solid components. Easily separated Examples: pizza, salad, soil.

Heterogeneous Mixtures Suspension: a heterogeneous fluid containing solid particles that are sufficiently large for sedimentation. (Ex. Flour in water) Colloid: a substance microscopically dispersed evenly throughout another one (Ex. Milk) Emulsion: a mixture of two or more immiscible (unblendable) liquids (Ex. Vinagrette

Atoms -Mixtures Explain: